Quarter	Percent
1999-04-01	51.1178547726041
2000-04-01	51.0460885385082
2001-04-01	50.9355823584535
2002-04-01	49.9619903508178
2003-04-01	49.0062012242158
2004-04-01	48.8873194993313
2005-01-01	49.3155904974880
2005-04-01	49.8570312578245
2005-07-01	50.3236476731646
2005-10-01	50.4461939629932
2006-01-01	49.8669876647639
2006-04-01	50.6546382723155
2006-07-01	51.3013666039754
2006-10-01	51.7769279668440
2007-01-01	50.8985726562324
2007-04-01	51.8507742702497
2007-07-01	52.6160511915048
2007-10-01	52.5866670676420
2008-01-01	51.9884730565227
2008-04-01	52.2495727866339
2008-07-01	53.6320308401997
2008-10-01	53.2160689227556
2009-01-01	52.0962436119271
2009-04-01	52.0168480909013
2009-07-01	52.4594748484558
2009-10-01	52.9633969633970
2010-01-01	52.0373844028278
2010-04-01	52.4996278626195
2010-07-01	53.0776275060357
2010-10-01	53.1728113214687
2011-01-01	52.6934213619116
2011-04-01	53.5261365953635
2011-07-01	53.9978822238196
2011-10-01	54.2813137195914
2012-01-01	53.2392513182103
2012-04-01	53.7666550150101
2012-07-01	54.4547297938173
2012-10-01	54.2197676262784
2013-01-01	53.2814041381077
2013-04-01	54.1478133573564
2013-07-01	54.3571815551944
2013-10-01	54.3752451492290
2014-01-01	53.5663569033870
2014-04-01	53.9648188366131
2014-07-01	54.6924899818962